<!DOCTYPE html>
<html class=''>

<head>
    <meta charset='UTF-8'>

    <style>
        body {
            background-color: #272727;
        }
        #loginform {
            width: 550px;
            height: auto;
            position: relative;
            margin: 0 auto;
            background-color: #272727;
        }

        .input {
            display: block;
            margin: 0px auto 15px;
            border-radius: 5px;
            background: #333333;
            width: 85%;
            padding: 12px 20px 12px 10px;
            border: none;
            color: #929999;
            box-shadow: inset 0px 1px 5px #272727;
            font-size: 0.8em;
            transition: 0.5s ease;
        }

        .input:focus {
            transition: 0.5s ease;
            box-shadow: 0px 0px 5px 1px #161718;
        }

        .submit {
            background: #ff5f32;
            border-radius: 50%;
            border: 10px solid #222526;
            font-size: 0.9em;
            color: #fff;
            font-weight: bold;
            cursor: pointer;
            width: 85px;
            height: 85px;
            position: absolute;
            right: -42px;
            top: 54px;
            text-align: center;
            transition: 0.5s ease;
        }

        .submit:hover {
            background: #222526;
            border-color: #ff5f32;
            transition: 0.5s ease;
        }

        .submit i {
            font-size: 20px;
          
            transition: 0.5s ease;
        }

        .submit:hover i {
            color: #ff5f32;
            transition: 0.5s ease;
        }

        *:focus {
            outline: none;
        }

        .title {
            text-align: center;
            color: #fff;
            font-size: 13px;
            padding: 12px 0px;
        }

        #note {
            color: #88887a;
            font-size: 0.8em;
            text-align: left;
            padding-left: 5px;
        }

        #card {
            text-align: center;
            float: left;
            background: #365195;
            padding: 35px 10px 20px 10px;
            width: 170px;
            height: 135px;
            border-radius: 3px;
            cursor: pointer;
            box-shadow: 0px 0px 10px 2px #161718;
            margin-right: 10px;
            transition: 0.5s ease;
        }

        #card:hover {
            box-shadow: 0px 0px 0px 0px #161718;
            transition: 0.5s ease;
        }

        #mainlogin {
            float: left;
            width: 250px;
            height: 170px;
            padding: 10px 15px;
            position: relative;
            background: #555555;
            border-radius: 3px;
        }


        #dot {
            position: absolute;
            left: -25px;
            top: 10px;
            background: #222222;
            text-shadow: 0 2px 0px #121212;
            color: #999999;
            width: 40px;
            height: 40px;
            text-align: center;
            border-radius: 50%;
            font-weight: bold;
            line-height: 38px;
            font-size: 13px;
        }
    </style>
</head>

<body>
    <div id="loginform">
        <div id="card">
        </div>
        <div id="mainlogin">
            <div id="dot"></div>
            <h1 class="title">Welcome Back ！</h1>
            <form action="#">
                <input class="input" type="text" placeholder="username dot email" value="" required>
                <input class="input" type="password" placeholder="password" value="" required>
                <button  class="submit" type="submit">登录</button>
            </form>
        </div>
    </div>
</body>

</html>